Everything in the universe is made of matter. Matter is made of tiny objects called atoms. There are many types of atoms. When atoms of the same type combine, the result is an element. Some elements, like silver and oxygen, are found in nature. Others are man-made. When combined, elements can form new substances. For more information on elements, read Antoine Lavoisier: Founder of Modern Chemistry, another book in the Mission: Science series.

שם הספר
Genetics (Mission: Science)